ML20204J853

From kanterella
Jump to navigation Jump to search
Rev 4 to Emergency Operating Procedure ECA-2.1, Uncontrolled Depressurization of All Steam Generators
ML20204J853
Person / Time
Site: Millstone, Haddam Neck, 05000000
Issue date: 06/03/1988
From:
CONNECTICUT YANKEE ATOMIC POWER CO.
To:
Shared Package
ML20204H467 List: ... further results
References
ECA-2.1, NUDOCS 8810250266
Download: ML20204J853 (18)
v • d • e


Text

_____ __ _ ____ _ _ _ _ _ _ _ _ _ _

i JUN 0 31988 NUMBER mu ECA 2.1 UNCONTROLLED DEPRESSURIZATION key' OF ALL STEAM GENERATORS A.

PURPOSE This procedure provides actions for a loss of secondary coolant which affects all steam generators.

B.

SYMPTOMS OR ENTRY CONDITIONS

'nds procedure is entered fnxn E 2, FAULTED STEAM GENERATOR ISOLATION, Step 2, when an uncontrolled depressurization of all steam genentors occurs.

I 1

i i

i 1

h l

l i

I 8810250266 081007 Page 1 of 18 PDQ ADOCK 05000213 PDR p

JUN 0 31988 o

NUMBER TTT1R REV. ISSUE /DATE j

EC A 2.1 UNCONTROLLED DEPRESSURl7 ATION Rev.4 l

OF ALL STEAM GENERATORS l

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 1

r IF Ah7 SG PRESSURE INCREASES AT ANY TibfE DURING CAUTION:

o

\\

THIS PROCEDURE, E 2, FAULTED STEAbf GENERATOR ISOLATION, SHOULD BE PERFORhfED.

I FR H.1, RESPONSE TO LOSS OF SECONDARY HEAT SINK, l

o SHOULD BE lbfPLLhfEhTED ONLY IF A TOTAL AUX FEED %'ATER FLO%' CAPACITY OF 320 GPhi IS NOT l

AVAllABLE AT AhY Tlh!E DURING THIS PROCEDURE.

i IF THE TURBINE DRIVEN AFH' pub!P IS THE ONLY o

AVAllABLE SOURCE OF AUX FEED %'ATER FLO%',

STEAh! SUPPLY TO THE AF%' PUh!P AfUST BE AfAlhTAINED FROh! AT LEAST ONE SG.

L J

l THE ELECTRIC AUX /UARY FEED %'ATER PUhfP CAN BE NOTE:

o USED IF TURBINE DRIVEN PUSIPS ARE INOPERABl.E.

o FOLDOUT PAGE SHOULD BE OPEN.

l l

1 CIIECK SECONDARY PRESSURE MANUALLY CLOSE VALVES.

t BOUNDRY:

IE VALVES CAN EQI BE CLOSED, j

o Check main steamlir.e is,olation and

'IllEN DISPATCH OPERATOR TO i

bypass valves CLOSED LOCALLY CLOSE VALVES,ONE I

1 LOOP AT A TIME.

I o Check feedwater flow control valves -

CLOSED I

o Check main feedline motor operated isolation valves CLOSED j

o Check SG blowdown isolation valves -

l CLOSED o Check turbine driven AUX feedwater

)

pump steam flow control valves -

CLOSED l

Check atmospheric vent valve -

l o

CLOSED Page 2 of 18

JUN031c88 NUMBER TTTLE REY. ISSUE /DATE EC A 2.1 UNCONTROLLED DEPRESSURIZATION Rev.4 OF ALL STEAh! GENERATORS STEP ACTION / EXPECTED RESPONSE RESPONSE NOT UBTAINED

~

r l

CAUTIONt A SilNISfUAf FEEDWATER FLOW OF 23 GPbf AfUST BE AfAlhTAINED TO EACH SG WITH A WIDE RANGE LEVEL l

LESS THAN 63 % ( 67 % FOR ADVERSE CONTAINhfEhT ).

l L

J j

2 CONTROL FEEDWATER FLOW TO I

htIN15tlZE RCS COOLDOWN:

I i

a. Check cooldown rate in RCS cold
a. Decrease feedwater flow to 25 GPhi legs LESS DIAN 100* F / HR to each SG, QQIQ Step 2 c.
b. Check wide range levelin all SGs -
b. Control feedwater flow to maintain LESS DIAN 69 %

wide range levelless than 69 % in all SGs.

c. Check RCS cold leg temperatu2es -
c. Control feedwater flow STABLE OR DECREASING QR dump steam to stabilize RCS cold leg temperatures.

l NOTEt SEAL INJECTION FLOW SHOULD BE AfAINTAINED TO ALL RCPS.

t 3

Cl{ECK IF RCPs SHOULD BE STOPPED:

a. Check HPSI QR charpg pumps-
a. QQ IQ Step 4.

l AT LEAST ONE RUNNING

b. Check RCS pressure-
b. QQIQ Step 4.

LESS THAN 1150 PSIG (1380 PSIG FOR ADVERSE CONTAINhtENT)

I

c. Stop all RCPs l

l

d. Close all four seal water retum 510Vs
e. IE containment pressure is l

greater tt an 5 PSIG, BlEN perform the foUwing:

l

1. Close CH TV 240, CH TV 241 i

(r,eal water return trip valves).

l 2 Clow CC TV 1411 (CCW retum from RCP oil coolers)

Page 3 of 18

JUN 0 31988 NUMBER TmE REY.lS W ES ATE ECA 2.1 UNCONTROLLED DEPRESSURIZATION Rev.4 OF ALL STEAM GENERATORS STEP ACT10N/ EXPECTED RESPONSE RESPONSE NOT OBTAINTD l

4 CIECK DWST LEV ~L -

START MAKEUP TO DWST.

I GREATER THAN 54,u)0 GALLONS l

i r

7 CAUTION:

IF A VY PRZR PORY OPENS BECAUSE OF HIGH PRZR PRESSURE,57EP 5 b SHOULD BE REPEATED AFTER PRESSURE DECREASES TO LESS THAN 2350 PSIG.

L J

l 5

CIECK PRZR PORVs AND BLOCK VALVES:

a. Check power to block valves -
a. Restore power to block valves.

AVAILABLE

b. Check PORVs CLOSED
b. E PRZR pressure is less than 2350 PSIG, THEN manually close PORVs.

IE any PORY can NQIbe closed, TIEN close its block valve,

c. Check PORY block valves CLOSED
c. IE PRZR pressure is less than 2350 PSIG, DEN rnanually close PORV l

block valves, j

.i f

l i

t I

d l

2 1

Page 4 of 18

JUN 0 31988 NUMBER TTRI REY. ISSUE /DATE l

E C A 2.1 UNCONTROLLED DEPRESSURIZATION Rev.4 i

OF ALL STEAM GENERATORS l

STEP ACT10N/ EXPECTED RESPONSE RESPONSE NOT OBTMNED F

7 CAUTION:

o Af0NITOR RCS PRESSURE. IF RCS PRESSURE DECREASES TO LESS THAN 405 PSIG (635 PSIG FOR ADVERSE COhTAINhfEhT), THE 12SI PUbfPS AfUST BE AfANUALLY STARTED TO SUPPLY %'ATER TO THE RCS.

I o

IF OFF SITE PO%'ER IS LOST AFTER RESETTING Si, AfANUAL ACTION AfAY BE REQUIRED TO RESTART i

SAFEGUARDS EQUIPEhfEhT.

l o

IF COhTROL 5%' ITCH FOR ANY SHUTDOn'N CHARGING PUAfP H'AS TAKEN TO THE TRIP POSITION, THE PUh!P(S)

SfAY AUTO START n' HEN BOTH SI H'L RELAYS ARE RESET.

6 CilECK IF 1. PSI PUMPS SHOULD BE STOPPED:

a. Check RCS pressure -
a. GQ IQ E 1, GREATER THAN 405 PSIG LOSS OF REAL70R OR (635 PSIG FOR ADVERSE SECONDARY COOLAST, Step 1.

CONTAINMENT) i

b. Check RCS pressure -
b. GQIQ Step 7.

STABLE Q1 INCREASING I

c. Reset Si and containment isolation:

j

1. Check containment pressure -
1. Perform the following:

LESS THAN 5 PSIG

a. Open CKTs A13 and B13 in l

DC panels A and B.

l

b. Reset St WL Relays, j
c. IE charging pump control switch (es) are EQIin TPO, I

'HIEN restore low discharge pressure auto start for shutdown charging pump (s) by taking pump contml switch (es) to the Trip" position then releasing I

switch (es) to the "Auto" position. j

d. QQ IQ Step 6 d.

l

2. Reset Si and containment isolation (SEE OPPOSITE PAGE)
d. Stop LPSI pumps and place in standby l

Page 5 of 18

JUN 0 31988 NUMBER EU REV. ISSUESAE E C A.2.1 UNCONTROLLED DEPRESSURIZATION Rev, 4 OF ALL STEAM GENERATORS SEP ACTION / EXPECTED RESPONSE l

RESPONSE NOT OBTAINED 7

VERIFY CONTAINMENT SPRAY NOT REQUIRED:

l

a. Check containment pressure -
a. Manually initiate containment spray.

l LESS THAN 40 PSIO W11ENcontainment mssure I

decreases to 35 PSIC TIEN close containment spray valves.

rable, IEont one LPSI open RH h5 T1E (fire main to containment spray).

WlENcontainment nssure decreases to 35 PSIC',

TIEN close RH MOV.31, 8

CIECK RWST LEVEL GD 10 ES.I.3, GREATER THAN 130,000 OALLONS TRANSFER TO RHR RECIRCULATION, STEP 1.

9 CHECK IF SI FLOW SliOULD BE REDUCED:

a. Check RCS subcooling based on
a. DO NOT STOP St PUMPS.

core exit thermocouples -

RETURNIQ Step 2.

GREATliR1RAN 32

  • F (SEE OPPOSTI11 PAGE FOR ADVERSE CONTAINMENT)
b. Check RCS pressure -
b. DO NOT STOP St PUMPS, STABLE DE INCREASING RETURNIQ Step 2.
c. Check PRZRlevel.
c. DO NOT STOP St PUMPS.

)

GRENiliR1 MAN 10 %

(24 % FOR ADVERSE Try to stabilize RCS pressure with CONTAINMENT) normal PRZR spray, RETURN IQ Step 9 a.

l l

1 i

Page 6 of 18

JUN 0 31988 NUMBER TTTLE REY. ISSUESATE E C A.2.1 UNCONTROLLED DEPRESSURIZATION Rev.4 OF ALL STEAM GENERATORS STEP ACTIONEXIfCTED RESPONSE RESPONSE NOT OBTAINED

~

l r

7 CAUTION:

o IF OFF $1TE POH'ER IS LOST AFTER RESETTING SI, SfANUAL ACTION AfAY BE REQUIRED TO RESTART SAFEGUARDS EQUIPEhfENT.

o IF CONTROL SWITCH FOR ANY SHUTDOH'N CHARGING l

PUAIP %'AS TAKEN TO THE TRIP POSITION, THE PUSfP(S) l AfAY AUTO START %' HEN BOTH Si %'L RELAYS ARE RESET.

L J

i 10 RESET SI > NO CONTAINMENT ISOLATION:

)

a. Check containment pressure -
a. Perform the following:

LESS TilAN 5 PSIO

1. Open CKTs A13 and B13 in DC panels A and B.
2. Reset SI WL Relays.
3. E charging p:.mp control switch (es) are b'QIin TPO, I

DIEN restore low dhcharge pressure auto start for shutdown charging pump (s) by taking yump control switch (es) to the awitch(position then releasing

' Trip" es) to the "Auto" position.

4

4. GQ IQ Step 11.

t

b. Reset SI and containment isolation (SEE OPPOSITE PAGE) 11 CliECK CONTAINMEhT START ONECONTAINMEST INSTRUMEST AIR PRESSURE lhmlUMENT AIR COMPRESSOR GREATER DIAN 118 PSIG TO ESTABLISil INSTRUMEST AIR PRESSURE.

i 12 STOP AND PLACEIN STANDBY ALL BUT ONE Cl{ARGING PUMP 13 CitECK RCS PRESSURE DO NOT STOP ADDIBONAL STABLE OR INCREASING St PUMPS.

RETURN IQ Snip 2.

14 COSTROL CIIARGING F1.OW E PRZR LEVEL CONTLNUES TO 7 0 MAlhTAIN PRZR LEVEL

DECREASE, l

RETURN IQ Snip 2.

i, t

Page 7 of 18

JUN 0 31988 NUMBER Tm2 REY. ISSUESATE EC A.2.1 UNCONTROLLED DEPRESSURIZATION Rev.4 OF ALL STEAM GENERATORS STEP ACT10N/EXPEC1TD RESPONSE RESPONSE NOT OBTAINED 15 CIIECK IF IIPSI PUMPS SHOULD BE STOPPED:

a. Check RCS pressure:
a. DO NOT STOP ADDirlONAL St PUMPS.

o GREATER TilAN 1475 PSIG RETURN IQ Step 2.

j (1700 PSIG FOR ADVERSE CONTAINMEST) o STABLE OR INCREASING I

b. Stop ilPSI pumps AND place in standby 16 STOP LPSI PUMPS AND PLACE IN STANDBY 17 VERIFY SI FLOW MOT REQUIRED:
a. Check RCS subcooling based on
a. Manually operate SI pumps core exit thermocouples.

as necessary.

GREATER DIAN 32

  • F RETURN I.Q Step 2.

(SEE OPPOSITE PAGE FOR ADVERSE CONTAINMENT)

b. Check PRZR level.
b. Contml charging flow to maintain GREATER TilAN 10 %

PRZR !cvel.

(24 % FOR ADVERSE IE PRZR level can liQIbe nuintained, CONTAINMEST) 11{EN manually operate SI pumps as necessary.

RETURN IQ Siep 2.

18 CliECK RCS COLD LEG CON ~IROL AUX FEEDWATER F1.OW TEMPERATURES OR DUMP STEAM TO STABILIZE P.CS STABLE OR DECREASLNG COLD LEO TEMPERATURES.

19 Cl{ECK WIDE RANGE LEVEL CONTROL AUX FEEDWATER FLOW IN ALL SGs LESS THAN 69 %

TO MAINTAIN WIDE RASGE LEVEL LESS THAN 69 % IN ALL SGs.

20 CIIECK PRZR LEVEL CONTROL CIIARGING FLOW AS GREATER 'IllAN 15 %

NECESSARY TO MAISTAIN LEVEL (35 % FOR ADVERSE COSTAINMENT)

Page 8 of 18

JUN 0 31988 butBER TTlu REY. lSSI.1RDATE I

ECA 2,1 UNCONTROLLED DEPRESSURIZATION Rev.4 OF ALL STEAM GENERATORS l

l STYP ACT10N/ EXPECTED RE3PON$h RESPONSE NOT OBTAINED 21 ESTABLISH LEIDOWN IE CONTAINMENT PRESSURE IS f

(SEE OPPOSITE PAGE)

LESS THAN 5 PSIO, i

IIIES ESTABLISH ALTERNATE LETDOWN BY PERFORMING T1IE i

l FOLLOWING i

1. Reset Containment HCP WL Relays.
2. Open DH.TV 1841, drain header trip l

valve.

i

3. Reset solenoid in blowdown room for !

drain header trip valve, DH TV 1847. !

4. Line up drain header to VCT:

l I

l

a. Cose DH V 408, drain header i

to PDT.

b. Open CH V 383, drain header j

to V C r.

i

5. Cose breaker for DH MOV 310.
6. Open one loop drain MOV.
7. "Ihrottle DH MOV-310 to maintain PR2R level.
8. Cose CH MOW 292B and CH MOV 292C.

22 CHECK VCT MAKEUP COh'IROL SYSTEM:

a. Check blender ratio set at -

a.

S'. blender ratio for greater GREATER TIIAN RCS RCS boron concentration.

i BORON CONCEN'IRATION

b. Check controls set for-AUTOMATIC
b. Set ca trols for automatic, i
c. Ensure RCS baron concentration
c. Berate RCS as necessary to nuintian

~

is maintained greater than required required baron corcentration.

IN ACCORDANCE WTITI SUR 5.3 '9, BORAT10N REQUIREMENTS FOR REACTOR SHUTDOWN.

)

o Sample RCS i

23 ALIGN CHARGING PUMP SUCTION TO VG 1

a. Open CH MOV 257 l
b. Cose BA MOV 373
c. Check BA MOV-32 CLOSED
c. Cose BA MOV 32.

Page 9 of 18

JUN 0 31988 NUME'ER Tm.E REY. ISSUE /DAll E.CA 2.1 UNCONTROLLED DEPRESSURIZATION Rey,4 OF ALL STEAM GENERATORS

$TEP ACT10NEXPEC'TED RESPONSE RESM)NSE NOT OBTAINED 24 CliECK RCP SEAL RETURN STOP AFFECIID RCP(s).

i FLOWS GREATER T11AN O.2 GPM f

25 COSTROL PRZR PRESSURE:

a. Turn on PRZR heaters
a. E normal spray is SQIavailable AEQ operate rormal PRZR Mletdown ts in senice, spray as necessary to maintain DIEN use auxiliary spray.

PRZR pressure stable E eatillary spray is b'QIavallable.

IFES use one PRZR PORV.

26 CIIECK RCP COOLING SYSTEMS:

E.'YABLISH NORMAL COOLING f

FLOW TO RCPs o RCP CCW System flow. NORMAL IN ACCORDANCE WTTH, i

o RCP sealin}:ction flow NORMAL l

NOP 2.81, OPERAT10N OF COMPONEST COOLING SYSTEM, ASD NOP 2.61.

SEAL WA*IER STARTUP NORMAL OPERATION.

27 VERIFY ALL ACBUSES ENERO! ZED TRY TO RESTORE OIT SITE POWTR BY OFF SITE POWER TO AC BUSES.

(SEE OPPOSITE PAGE)

E OFF STTE POWER CAN SQI BE

RESTORED, f

ILES LOAD T1IE FOU.OWING EQUIPMEST ON AC FMERGENCY BUSES:

1. MCC 5,
2. Control air compressors.
3. Semi vital 120 volt buses.
4. Closed cooling system pumps.
5. Banery charger I A.
6. One component cooling water pump.
7. One semcc water pump for each diesel.
8. E senice water is used for RIIR ILX, DIEN use two senice water pumps.
9. Stan CARFANs as required tolirmt containment pressure and temperature.

l l

Page 10 of 18

JUN 0 31988 FUMBER TME REY ISSLTAATE E C A.2.1 UNCONTROLLED DEPRESSURIZATION Rev. 4 OF ALL STEAM GENERATORS STEP ACT10N/EXPECIID RESPONSE RESPONSE NOT OBTA!5TD lr CAUT10N:

IF RCP SEAL C00UNG FLOW HAD PREVIOUSLY BEEN LOST, THE AFFECTED RCPls) SHOUlD NOT BE STARTED PRIOR TO AN ENGINEERING STATUS EVALUATION.

L J

NOTEt RCPs SHOULD BE RUN IN ORDER OF PRIORITY TO PROVIDE NORMAL PRZR SPRAY, 28 CHECK RCP STATUS:

a. Check RCPs -
a. Try to st.vt one RCP:

AT LEAST ONE RUNNING

1. Establish condidons for staning an RCP:
a. Close too Tc isolation valve.
b. Open loo

> pass valve,

c. Stan oilI pump.
d. Insure seal water and component ecoling water supplied to RCP.
e. Insure lower bearing temperature j

is less than 170' F.

f. Check RCS pressure greater than 300 PSIO.
g. Open CH TV 240. CH.TV 241 and CH W 334.

(sem water return tnp valves) h Open CC TV 1411 (oil cooler CCW rerum trip valve)

1. Open seal water return MOV.
2. Start selected RCP, 11EN perform the following:

l

a. Open 100 Te isolation valve,
b. Close it bypass valve.

IE RCP can EQI be staned.

11EN perform the fo!!owing:

i

a. Oxn loop Tc holation valve.
b. C ose loop b> Tass valve.
c. Verify narural ein:ulation (SEE ATTACHMENT A).

IE natural circulation EQI verified.

HIES increase dumping steam.

l i

Page 11 of 18

JUN 03 W88 NUMBER TTil.E REY ISSUE /DATE l

ECA 2,1 UNCONTROLLED DEPRESSURIZATION Rev.4 OF ALL STEAM GENERATORS l

STEP ACTIONEXPECTED RESPONSE RESPONSE NOT OBTAINED i

29 CIIECK SOURCF. RANGE l

DE1ECTORS ENcRGIZED:

I I

a. Check intermediate range flux -
a. Contir ue with step 30, t

4 LESS T11AN 5 x 1010 AMPS M1IEN less than 5 x 10'30 AMPS, I

l TilEN do steps 29 b, e and d.

t l

b Verify source range detectors -

b. Manually energize source tsnge I

j ENERGlZED detectors.

t il

c. Transfer nuclear flux recorders l

to source range scale l

l l

i

d. Transfer SUR meters to source t

i range l

30 CHECK IF DIESEL GENERATORS l

J SHOULD BE STOPPED:

j

a. Verify ae emergency buses energized -
a. Try to restore off site power to l

1 BOTH TRAINS BY OFF STm both trains.

t i

POWER (SEE OPPOSTE PAGE)

)

)

BUSES 8,4 and 5 IE NOIrestored, s

i ASD 311ES load the following equipment i

j BUSES 9,6 and 7 on the ac emergency buses:

i l

I l.MCC 5.

1

2. Control air compressors.

l 4

i

3. Semi. vital 120 V buses.
4. Closed cooling system pumps.
5. Battery charger I A.

l

6. One component cooling water l

[

)

7. One service water pump fur each f

]

diesel generatcr.

t

8. IE service water is supplied to j

t 1

1 RilR heat exchangers, i

11IEN use at least two senic I

water pumps.

4

9. Start CARFANS as required to l

limit containment pressure ud

[

l temperature.

l l'

b. Stop any unloaded diesel t

generatoe and place it in standby l

1 (SEE OPPOSITE PAGE) l l

I i

I f

i l

Page 12 of 18 i

i I

1

~

Juli1L1388 NUMBER TTTU REY. !SSUE/DATE i

E C A.2.1 UNCONTROLLED DEPRESSURIZATION Rev 4 l

OF ALL STEAM GENERATORS J

$TEP Act ON/ EXPECTED RESPONSE RESPONSE NOT OBTAINED 31 SMUT DOWN UNNECESSARY PLAST EQUIPMENT I

a. Stop one main feedwater pump I
b. Stop one condensate pump t
c. Place standby heater drain pump inTTO
d. Place running heater drain pump l

l

]

in1TO j

4 32 MAISTAIN STABLE PLAST CONDmONS:

o PRZR pressure o PRZRlcvel o RCS average temperature i

33 VERIFt St FLOW NOT REQUIRED:

I I

a. Check RCS subcooling based on
a. Manually operate SI pumps i

core exit thermocouples -

a necessary.

GREATER *nIAN 32

  • F RrTURN I_Q Step 2.

i (SEE OPPOSTE PAGE FOR ADVERSECOSTAINMENT)

I

b. Check PR~G level.
b. Contml charging flow to maintain GREATER DIAN 10 %

PRZR level.

(24 % FOR ADVERSE lE PRZR levelcan b'QIN maintained.

COSTAINMENT)

TiiEN manually operate Si pumps as necessary.

RETURN I.Q Step 2, 34 CHECK IF SOLID PLAST CONDITIONS SHOULD BE ESTABLISlIED:

a. Check PRZR steam phase temperature -
a. Continue RCS cooldown and LESS TilAN 450' F depre.surization.

WHEN PRZR steam phase temperature is less than 450' F.

TifdN do step 34 b.

b. Increase PRZR ineI to 100 %

Page 13 of 18

JUN 0 31988 NUMBER TTRE REY. lSSLT/DATE E C A.2.1 UNCONTROLLED DEPRESSURIZATION Rev. 4 OF ALL STEAM GENERATORS STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAISID q

I CAUTlON:

THE SI SYSTEM MUST BE DISABLED BEFORE RCS r

TEMPERATURE IS LESS THAN 315

  • F.

l I

I 35 PERFORM COLD SillTTDOWN ALIGNMENT:

a. Check core exit thermocouples -
a. Continue RCS cooldown.

LESS TIIAN 350' F WifEN eore exit thermocouples are less than 350' F.,

b. Align core cooling equ_ipment IN ACCORDANCE wTTil NOP 2.3-4 IlOT STANDBY MODE 3 TO COLD SIRTIDO%W MODE 5 ASD NOP 2.121, CORE COOL 2iG SYSTEM LINEUP 1

FOR S}RTIDOWW AND ATPOWER l

OPERATION j

c. Check iflow temprature over
c. WHEN all conditioas are satisfied, pressure protection relief valves 111EN do step 35 d.

should be placed in fervice:

1. Check PRZR level SOLID l

l

2. Check RCS temperature -

LESS MAN 325' F

3. Check PR2R wmperature -

LESS WAN 430' F

4. Check RCS pressure -

LESS ' IRAN 325 PSIO

d. Place low tempenture over i

7ttssure protecuon relief valves un semce IN ACCORDANCd %TTH NOP 2.3-4 IlOT STANDBY MODE 3 TO COLD SIIU1DOWW MODE S i

Page 14 of 18

i JUN 0 31988 i

NUMBER EU REY. ISSUE /DAR i

EC A.2.1 UNCONTROLLED DEPRESSURIZATION Rey, 4 j

j OF ALL STEAM GENERATORS l

1

$EP ACTION / EXPECTED RESPONSE RESPONSE NOT 08TALGD I

1 i

36 CllECK RCS COLD LEO COS"IltOL AUX FEEDWARR FLOW j

1EMPERATURES AND DUMP STEAM TO ESTABLISi{

LESS 1HAN 30C* F A COOLDOWN RATE OF 100' F / HR (277' F FOR ADVERSE IN THE RCS COLD LEGS.

j COSTAINMENT) l 37 CHECK RCS PRESSURE E PRZR IS SOLID, i

LESS 1hAN 300 PSIO THEN CON 11tOL CHARGING l

(t 310 PSIO FOR ADVERSE NSD LEIDOWN FLOWTO j

COSTAINMEhT)

MAlhTAIN RCS PRESSURE.

E PRZR IS EQISOLID, j

11IEN USE NORMAL PRZR SPRAY 4

TO MAlhTAIN RCS PRESSURE.

E NORMAL SPRAY i

hg AVAILABLE i

LE1DOWN IS IN SERVICE, USE AUXILIARY SPRAY.

L E AUXILIARY SPRAY i

EQI AVAILABLE, i

ItiEN USE ONE PRZR PORV.

l 38 CHECK IF RHR SYSTEM CAN BE PLACED IN SERVICE:

a. Check the following:
a. REIIIRN IQ Step 36, o RCS tem wature -

LESS 11 AN 300' F (277' F FOR A') VERSE COSTAINMENT) o RCS pressure.

LESS THAN 300 PS10

(* 310 PSIO FOR ADVERSE CONTAIhWEST) l

b. Place RHR system in service IN ACCORDANCE %T!H NOP 2.91, RHR SYSTEM PLACING SYSTEd IN SERVICE I

Page 15 of 18

JUN 0 31988 i.

PLUMBER TITLE REY.15SLT/DATE EC A.2.1 UNCONTROLLED DEPRESSURIZATION Rev. 4 OF ALL STEAM GENERATORS f

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTALNED 39 CONTINUE COOLDLWN TO COLD t

SilUTDOWN:

a. Maintain cooldown nie in RCS l

cold legs LESS 1RAN 100' F / HR.

i

b. Check wide range levelis all SGs -
b. Control AUX feedwater flow to LESS THAN 69 %

maintain wide range levelin all SGs

(

less than 69 %.

40 CIIECK RCS TEMPERATURES RETURNIQ SEP 39.

LESS THAN 200' F 41 EVALUATE LONG TERM PLAhT STATUS:

i

a. Maintain cold shutdown conditions j
b. Consult with plant engineering staff 4

i I

b) l I

j i

a f

l r

i l

t i

l l

I i

i l

i 1

(

i l

i Page 16 of 18 l

JUN 0 31988 NUMBER Till.E REY lSSUE/DA1E EC A 2.1 UNCONTROLLED DEPRESSURIZATION Rev. 4 OF ALL STEAM GENERATORS

]

P i

ATTACINENT A

{

I

'!he following condidons support or indicate natural circulation flow:

i o

RCS subcooling based on core exit thermocouples is greater than 32' F.

1 o

SG pressures are stable or decnasing.

i l

4 o

RCS temperature based on core exit thermocouples and average temperature indications is stable or decnasing, i

4 o

RCS cold leg temperatures are at saturation temperature for 50 pressures.

l l

l i

I t

)

t i

I l

l l

l l

I f

f 1

I i

L i

i i

l 1

i l

Page 17 of 18 1

1

JUN 0 31986 REY. lSStlE/DATE Rev,4 FOLDOUT EQR ECA 11 PROCEDLtRE 1.

SJ REINTTIATION CRTERIA i

Manually operate charging OR SIpumps as necessary, E either condition listed below occurs:

o RCS subcooling based on core esit thermocouples LESS TIIAN 32' F.

o PRZR level CANNOT BE MAINTAINED GREATER 'I1'.AN 10%

4 (24% FOR ADVERSE CONTAINMENT).

i 1

2.

RED PA111 StNMARY s.

SUBCRITICALLY Nuclear power greater than 5%.

J b.

CORE COOLING -

Core exit thermocouples greater than 1200* F.

j c.

IIEAT SINK -

Total AVAILABII feedwater flow capability

~

less than 320 GPM.

d.

INTEGRTIY -

Co'.d leg temperatua decreases greater than 100* F i

i in last 60 minutes AER RC'S cold leg temperature less than 231' F.

c.

CONTAINhENT-Containment pressure greater than 40 PSIO.

3.

E 2 TRANSITION CRITERION j

GQ IQ E 2, FAULT 1iD STEAM OENERATOR ISOLATION, Step 1, E any 50 pressure increases at any time.

4 RHR RECIRCULATION SWTTCHOVER CRTERION i

GQ IQ ES 1.3.'illANSFER TO RHR RECIRCULAT10N, Step 1, E RWST level decreases to less than 130.000 gallons.

l

( LPSI pumps may cavitate E RWST level is less than 70,000 gallons. )

t 5.

ADE SUPPLY MAKEUR CRTTERION Start rdeup to DWST before Icvel decreases to 54,000 gallons.

i Page 18 of 18

Retrieved from "https://kanterella.com/w/index.php?title=ML20204J853&oldid=4065905"